WSU got on the board on the first shift of the game when Nate Higgins scored the first of his three goals 54 seconds into the game.
Team USA rallied to take a 3-1 lead before Higgins scored two more and Mark Nebus gave the Warriors the lead at 7:35 of the second period on a WSU power play.
After two late third-period goals by the U.S., Krug (pictured) knotted the game with a blast from the point at 18:54 on a five-minute power play and then won it on the same man-advantage, with the same shot, 2:14 into the extra session.
"Wayne State's power play was unbelieveble," USA head coach Ron Rolston said in noting WSU scored five of their goals with the man-advantage. "I'm surprised they are where they are in the standings."
Will Hooper made 20 saves for Wayne State and Josh Unice stopped 20 for Team USA.
Jason Baclig and Jon Grabarek each had three assists for WSU.
Jimmy Hayes scored twice for the U.S. and Ian Cole, James van Riemsdyk and Ryan Hayes added singles.
The Warriors host Alabama-Huntsville this weekend for two CHA contests.